Alert archive / Mississippi / Mesoscale Discussions in 2020

Mesoscale Discussion 231

March 24, 20209 counties in Arkansas; 11 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 24, 2020, 7:55 PM CDT for 9 counties in Arkansas; 11 counties in Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Mar 24, 2020, 7:55 PM CDT (00:55 UTC)
Expired
Mar 24, 2020, 10:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Arkansas County, AR, Bradley County, AR, Chicot County, AR, Cleveland County, AR, Desha County, AR, Drew County, AR, Lee County, AR, Lincoln County, AR, Phillips County, AR, Bolivar County, MS, Coahoma County, MS, DeSoto County, MS, Leflore County, MS, Panola County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Washington County, MS

The radar

The Little Rock radar (KLZK), 150 km from the middle of the area, began a volume at 00:58 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.9 hours before the alert went out and 208 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Jackson, MS at 00:00Z on 2020-03-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 178 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 00:00Z on 2020-03-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 243 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
178 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
1249 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
243 m²/s²
0-3 km storm-relative helicity
309 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.0

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in Mississippi, 2020Mesoscale Discussions in Arkansas, 2020Every mesoscale discussion in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.